EP0980077A1 - Verfahren zum Einbauen von gefährlichen und teueren Stoffen auf Aluminiumträger mit einer sehr niedrigen anodisierten Stärke - Google Patents

Verfahren zum Einbauen von gefährlichen und teueren Stoffen auf Aluminiumträger mit einer sehr niedrigen anodisierten Stärke Download PDF

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Publication number
EP0980077A1
EP0980077A1 EP99500116A EP99500116A EP0980077A1 EP 0980077 A1 EP0980077 A1 EP 0980077A1 EP 99500116 A EP99500116 A EP 99500116A EP 99500116 A EP99500116 A EP 99500116A EP 0980077 A1 EP0980077 A1 EP 0980077A1
Authority
EP
European Patent Office
Prior art keywords
solvent
anodising
procedure
incorporation
additive mixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP99500116A
Other languages
English (en)
French (fr)
Other versions
EP0980077B1 (de
Inventor
Jose Luis D. Gascon Murillo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
Original Assignee
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas filed Critical Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
Publication of EP0980077A1 publication Critical patent/EP0980077A1/de
Application granted granted Critical
Publication of EP0980077B1 publication Critical patent/EP0980077B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21G—CONVERSION OF CHEMICAL ELEMENTS; RADIOACTIVE SOURCES
    • G21G4/00—Radioactive sources
    • G21G4/04—Radioactive sources other than neutron sources
    • G21G4/06—Radioactive sources other than neutron sources characterised by constructional features
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/18—After-treatment, e.g. pore-sealing

Definitions

  • the subject matter of the present invention is a procedure to deposit hazardous or costly substances onto the anodised layer of an aluminium support.
  • the applications of the subject matter of the invention are, mainly the preparation of extensive radioactive sources and in general the deposit onto anodised aluminium supports of hazardous (radioactive, toxic, medical, etc.) or costly products (silver salts for photography, noble elements for decoration, antithermal ceramic elements, etc.)
  • the Spanish standard UNE 21-72-90 and international one ISO 8769 specify the characteristics that radioactive sources used for the calibration of superficial contamination monitors must fulfil.
  • the area of the radioactive source must have a surface of at least 100 cm 2 and, as to the homogeneity or distribution of the activity of the radionuclide on the source, there should not be a variation above 10% in the specific surface activity measured at different parts of the source.
  • the simplest one is the one consisting in the evaporation of the solution deposited on the support.
  • the homogeneity of the activity on the surface of the source is quite acceptable, but has the drawback that the deposit is unprotected and may readily come off.
  • the procedure of the invention is based on the direct platting of the radionuclide solution onto an anodised aluminium support.
  • the radionuclide being absorbed onto the aluminium oxide porous layer, is platted in a homogeneous way and protected.
  • the procedure subject matter of the invention manages to increase this volume by modifying the surface tension between the liquid-solid phases; i.e., by varying the composition of the radionuclide solution it is possible to obtain a better absorption onto the anodised porous layer.
  • the procedure for the incorporation of hazardous or costly substances onto an anodised aluminium support subject matter of the invention consists in the use of solutions with small surface tension values (around 20 din cm -1 versus air and at 20°C) in solutions which must present determined characteristics.
  • the procedure for the preparation of extensive radioactive sources comprises the following stages:
  • the solvent shall be chosen as a function of the substance that is to be incorporated. Given that the solution thus prepared will not comply, in general, to the limits established for the surface tension, steam pressure and solid residue parameters which ensure the success of the procedure, it will be necessary to include surfactant additives which must also be compatible, in terms of solubility, with the solvent used.
  • the last removal stage, by rubbing, of the deposit which could have remained on the anodised layer, is essential in the application of the procedure to the preparation of extensive radioactive sources, in order to ensure the homogeneity of the radioactive activity and its endurance against mechanical aggressions, but may not be essential in other applications.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Physical Vapour Deposition (AREA)
  • Paper (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Slot Machines And Peripheral Devices (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Measurement Of Radiation (AREA)
EP99500116A 1998-08-10 1999-07-09 Verfahren zum Einbauen von gefährlichen und teueren Stoffen auf Aluminiumträger mit einer sehr niedrigen anodisierten Stärke Expired - Lifetime EP0980077B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES009801720A ES2152840B1 (es) 1998-08-10 1998-08-10 Procedimiento para la incorporacion de sustancias peligrosas o de elevado coste en soportes de aluminio con muy bajo espesor de anodizado.
ES9801720 1998-08-10

Publications (2)

Publication Number Publication Date
EP0980077A1 true EP0980077A1 (de) 2000-02-16
EP0980077B1 EP0980077B1 (de) 2003-03-19

Family

ID=8304857

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99500116A Expired - Lifetime EP0980077B1 (de) 1998-08-10 1999-07-09 Verfahren zum Einbauen von gefährlichen und teueren Stoffen auf Aluminiumträger mit einer sehr niedrigen anodisierten Stärke

Country Status (5)

Country Link
EP (1) EP0980077B1 (de)
AT (1) ATE235096T1 (de)
BR (1) BR9903556A (de)
DE (1) DE69905990D1 (de)
ES (1) ES2152840B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2355059C1 (ru) * 2007-08-02 2009-05-10 Открытое акционерное общество "Государственный научный центр Научно-исследовательский институт атомных реакторов"- ОАО "ГНЦ НИИАР" Способ изготовления активной части радионуклидного источника

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0015807A1 (de) * 1979-03-02 1980-09-17 COMMISSARIAT A L'ENERGIE ATOMIQUE Etablissement de Caractère Scientifique Technique et Industriel Verfahren zur Herstellung einer radioaktiven Strahlungsquelle und so erhaltene Strahlungsquelle
JPS6414090A (en) * 1987-07-09 1989-01-18 Fuji Photo Film Co Ltd Support for planographic printing plate

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0015807A1 (de) * 1979-03-02 1980-09-17 COMMISSARIAT A L'ENERGIE ATOMIQUE Etablissement de Caractère Scientifique Technique et Industriel Verfahren zur Herstellung einer radioaktiven Strahlungsquelle und so erhaltene Strahlungsquelle
JPS6414090A (en) * 1987-07-09 1989-01-18 Fuji Photo Film Co Ltd Support for planographic printing plate

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
FUSCHINI ET AL.: "A new method for preparing radioactive sources", NUCLEAR INSTRUMENTS AND METHODS., vol. 26, no. 2, March 1964 (1964-03-01), NORTH-HOLLAND PUBLISHING COMPANY. AMSTERDAM., NL, pages 301 - 304, XP002121134 *
GARCIA-TORANO E ET AL: "Preparation and standardization of large-area sources for calibration of alpha-particle contamination monitors", NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH, SECTION - A: ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, vol. 396, no. 1-2, 1 September 1997 (1997-09-01), pages 130-134, XP004097889, ISSN: 0168-9002 *
LALLY ET AL.: "Source preparation in alpha spectrometry", NUCLEAR INSTRUMENTS AND METHODS., vol. 223, 1984, NORTH-HOLLAND PUBLISHING COMPANY. AMSTERDAM., NL, pages 259 - 265, XP002121026 *
PATENT ABSTRACTS OF JAPAN vol. 013, no. 189 (M - 821) 8 May 1989 (1989-05-08) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2355059C1 (ru) * 2007-08-02 2009-05-10 Открытое акционерное общество "Государственный научный центр Научно-исследовательский институт атомных реакторов"- ОАО "ГНЦ НИИАР" Способ изготовления активной части радионуклидного источника

Also Published As

Publication number Publication date
EP0980077B1 (de) 2003-03-19
BR9903556A (pt) 2002-05-21
ES2152840B1 (es) 2002-02-01
DE69905990D1 (de) 2003-04-24
ES2152840A2 (es) 2001-02-01
ES2152840R (de) 2001-06-16
ATE235096T1 (de) 2003-04-15

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